checked the correlation between boost pressure and the compressor maps for the turbos.
Primary is at 2. 36:1, and the secondary is at 1. 92:1.
It's not identicly pressure compounded
But
It is right dead center of the sweet sput for both turbos. It is however lower than the max obtainable boost and flow rate for the system, but I really do not need the extra pressure.
The next step after a clutch is possibly an interstage cooler. I most likely will use engine coolant as the heat sink... anything over 12 psi on the primary will be cooled off... anything under will be warmed up... . a definate benefit in the winter!!
-Cliff